Nato is under threat from the EU and Donald Trump: what can Britain do to fix that?

A group of 120 British soldiers deployed to Estonia, as support to the North Atlantic Treaty Organization (NATO) Allies, where they will be working with allied partner nations, including France and Denmark, as part of the NATO reassurance missionCredit:
ESTONIAN DEFENCE MINISTRY HANDOUT

Sixty years after the Treaty of Rome was signed on 25 March 1957, leaders of the EU27 gathered in the same place, Capitoline Hill, to add their names to a statement of unity. Theresa May was not present at the ceremony last weekend, as she prepares to trigger Article 50 and begin the Brexit process. The question of security and foreign policy – once secondary to trade and economics – is playing an ever more important in the calculations of those who see Brexit as the opportunity to transform the EU into a truly federalist project. It is also an area in which Brexit Britain can still play an active and responsible role in European affairs.